Basically, I hit an enemy, the text "blackjack" appears briefly over the enemy in question, but nothing happens. The text feed in the upper left corner states that the enemy has woken up, but other than that there's no sign of them actually falling asleep... almost as if they're woken up by damage of the hit that procced Blackjack in the first place. At first I figured it was one of my many different damage types that caused some kind of conflict, but even though I'm only dealing slashing and piercing damage (lvl 4 axe skill + fine steel axe) it still doesn't work.
All right, I remember it working fine in 1.06 and I hadn't seen it mentioned here recently so I figured better safe than sorry.